Headphone



FIG. 1 is a perspective view of the headphone.

FIG. 2 is a front view thereof.

FIG. 3 is a back view thereof.

FIG. 4 is a side view thereof.

FIG. 5 is the other side view thereof.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The features shown in broken lines depict environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 